Hodo33 , Its all possibly quite contrary yet i believe that the rayleigh scattering is responsible for dimming things considerably in this case .
I think 999999 was as high as I could go .

@

Duion
I just played around with this because I agree that an orangish star would look nice , so those numbers produced the largest and darkest scatterSky sun that i could manage without super lighting the sky.background .